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I've seen this sort of thing where a DNS server is programmed in
resolv.conf but is not accessible over the network. Threads get
blocked, and you have to wait for the DNS query to timeout.<br>
<br>
<br>
<div class="moz-cite-prefix">On 16-06-07 10:48 AM, Brent Davidson
wrote:<br>
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<p>I am having an issue with a couple of phones where they ring,
but there is a long delay after the phone is picked up before
the audio starts. <br>
</p>
<p>My setup: <br>
</p>
<ul>
<li>Server running Asterisk 13.9.1, Dahdi 2.11.1 w/ OSLEC</li>
<li>Server is CentOS 7<br>
</li>
<li>Quad core CPU with 16GB Ram</li>
<li>2 Snom 300 phones.</li>
<li>NO NAT. Server and phone are on the same subnet with only a
gigabit switch between them.</li>
<li>Digium TDM400 analog card with 2 incoming analog PSTN lines<br>
</li>
</ul>
<p>When a call comes in, the system answers, IVR plays, caller
dials an extension, Snom 300 rings, handset picked up. Caller
continues to hear ringing for another 7 to 10 seconds. Answerer
hears a click, a quick burst of audio, then silence, then
another click and audio is engaged.</p>
<p>I have tried both SIP and RTP debugging and there are
absolutely no messages indicating any timeout or retransmit. I
am at a total loss. In the past I've always been able to find
an answer to issues like this on my own, but this time I just
don't know. I was even beginning to suspect the network switch
might be bad, but pinging between the server and the phones
shows no packet loss and 0.969ms average response time.<br>
</p>
<p>What am I missing<b>?</b></p>
Thanks,<br>
Brent Davidson<b><br>
</b> <br>
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